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  <title>Document</title>
  <script>
    // 利用对象封装自己的数学对象，里面有 PI 最大值和最小值
    var myMath = {
      PI: 3.1415926,
      max: function () {
        var max = arguments[0];
        for (var i = 1; i < arguments.length; i++) {
          if (arguments[i] > max) {
            max = arguments[i];
          }
        }
        return max;
      },
      min: function () {
        var min = arguments[0];
        for (var i = 1; i < arguments.length; i++) {
          if (arguments[i] < min) {
            min = arguments[i];
          }
        }
        return min;
      }
    }
    console.log(myMath.PI);
    console.log(myMath.max(3, 5, 22, 1, 434));
    console.log(myMath.min(34, 2, 43, 52, 4));
  </script>
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